Add labels, update just helper

Dockerfile

@@ -1,4 +1,10 @@
-FROM alpine:3
+FROM docker.io/library/alpine:3
+
+LABEL org.opencontainers.image.title=jswank/alpine-cli \
+      org.opencontainers.image.description="A minimal image for running Linux CLI utilities" \
+      org.opencontainers.image.url=https://git.sr.ht/~jswank/alpine-cli \
+      org.opencontainers.image.authors="Jason Swank" \
+      org.opencontainers.image.licenses=MIT
 
 RUN apk -U --no-cache add \
     doas doas-sudo-shim \

bin/cli

@@ -1,25 +1,66 @@
 #!/usr/bin/env -S just --working-directory . --justfile
 
 image := "ghcr.io/jswank/alpine-cli:latest"
-n := "cli"
+n := "alpine-cli"
 
-# run
+# Invoke the 'run' recipe
 default: run
 
-# run a temporary container based on {{image}}
+# Usage: run
+#
+# Start a shell in an ephemeral container.
+#
+# Examples:
+#   cli run
+#
+# Run an ephemeral container.
 @run:
-  podman run -ti --rm {{image}}
+  podman run -ti --userns=keep-id --rm {{image}}
 
-# run (or attach to) a persistent container {{n}}
+# Usage: persist
+#
+# Start a shell in a persistent container.
+#
+# Examples:
+#   cli persist
+#
+# Run (or attach to) a persistent container
 persist: 
   #!/bin/sh
-  if [ $(podman ps --all --filter name="{{n}}" -q | wc -l) -gt 0 ]; then
+  if [ $(podman ps --all --filter name="^{{n}}$" -q | wc -l) -gt 0 ]; then
     podman start -i -a {{n}}
   else
-    podman run -ti --name {{n}} {{image}}
+    podman run -ti --userns=keep-id --name {{n}} {{image}}
   fi
 
-# remove the persistent container
+# Remove the persistent container
 @clean:
   podman rm -f {{n}} >/dev/null 2>&1
 
+# Usage: save [new_image_name]
+#
+# Sometimes you want a quick snapshot of your work in progress. Use this target
+# to create an image based on the running container.
+#
+# Examples:
+#    cli save foo` - saves the current (persistent) container as a new image
+#                       named "foo"
+# `  cli save      - saves the current (persistent) container as a new
+#                       default image
+#
+# Save the running container as a new image
+save i=image:
+  podman commit -q {{n}} {{i}} >/dev/null 2>&1
+
+# Remove a running container, and run the default recipe
+@restart: clean default
+
+# Display this listing. Detailed help is available with 'help recipe_name'.
+help recipe="help":
+  #!/bin/sh
+  if [ "{{recipe}}" = "help" ]; then
+    just --list --justfile {{justfile()}}
+  else
+    grep -B 32 -E '^@?{{recipe}}\s?.*:' {{justfile()}} \
+      | tac |  awk 'NR==1 {print; next}; !/^#/{exit}1;' | tac
+  fi